The fastest way to block most pop-ups
Most modern browsers have a built-in pop-up blocker that works automatically. In Chrome, Firefox, Safari, and Edge, this feature is turned on by default — you do not have to do anything to set up it. When a pop-up is blocked, you will see a small notification at the top or bottom of the page, or a subtle icon in the address bar.
If pop-ups are still getting through, the problem is usually not your browser's blocker. It is more likely that a website you visit regularly has permission to show pop-ups, or that an extension you installed is allowing them. Blocking pop-ups completely requires you to either remove that permission or uninstall the extension.
Key Takeaways
- Your browser's built-in pop-up blocker is already on and blocks most pop-ups without any action from you.
- If pop-ups still appear, check whether you gave a website permission to show them, or whether an extension is allowing them through.
- You can block pop-ups from a specific website by removing its permissions in your browser settings, without blocking pop-ups everywhere.
- Pop-up blockers do not stop all pop-ups — some websites use tricks like opening new tabs or showing ads that look like system warnings.
- If your browser feels slower or shows unexpected ads, an unwanted extension may be the cause, and uninstalling it usually fixes the problem.
How to check if a website has pop-up permission
Websites can ask your browser for permission to show pop-ups. If you clicked "Allow" at some point, that website can now show pop-ups even though your blocker is on. To see which websites have this permission and remove it, open your browser settings and look for the section labeled "Permissions" or "Site Settings."
In Chrome, go to Settings, then Privacy and Security, then Site Settings, then Pop-ups and redirects. You will see a list of websites that have permission to show pop-ups. Click the trash icon next to any website you want to block. In Firefox, go to Settings, then Privacy and Security, scroll down to Permissions, and click the Settings button next to Pop-ups. In Safari, go to Preferences, then Websites, then Pop-up Windows, and change the dropdown for any website from "Allow" to "Block."
After you remove permission, that website's pop-ups will be blocked again. If the website asks for permission again the next time you visit, you can click "Block" instead of "Allow."
Removing extensions that allow pop-ups through
An extension you installed may be disabling your pop-up blocker or allowing pop-ups to appear. This happens most often when you install an extension quickly without reading what permissions it asks for. Some extensions that claim to do one thing — like change your search engine or add a coupon button — actually have permission to show ads and pop-ups on every website you visit.
To find the culprit, open your extensions list. In Chrome, click the puzzle piece icon in the top right, then click the three dots next to Manage Extensions. In Firefox, click the three horizontal lines in the top right, then click Add-ons and Extensions. In Safari, go to Preferences, then Extensions. Look through the list for extensions you do not remember installing or do not use regularly. Click the trash icon or toggle to remove them.
After you uninstall an extension, restart your browser. If pop-ups stop appearing, that extension was the problem. If they continue, check your website permissions as described above.
What pop-up blockers cannot stop
A pop-up blocker stops windows that open in a new tab or window without you clicking anything. It does not stop ads that appear inside a webpage itself, because those are not technically pop-ups — they are part of the page's content. You will see these ads in the middle of articles, in sidebars, or at the top of search results. A pop-up blocker cannot remove them.
Some websites also use tricks to get around blockers. They may open a new tab when you click a link, or show a fake system warning that looks like it came from your computer rather than the website. These are harder to block because they happen after you interact with the page. If a website repeatedly uses these tricks, the best solution is to use an ad-blocking extension like uBlock Origin or Adblock Plus, which you can install from your browser's extension store.
Using an ad-blocking extension for stronger protection
If your browser's built-in blocker is not enough, you can install an extension that blocks ads and pop-ups more aggressively. The most common choices are uBlock Origin, Adblock Plus, and Ghostery. These extensions block not just pop-ups but also banner ads, video ads, and tracking scripts that follow you across websites.
To install an extension, open your browser's extension store. In Chrome, go to the Chrome Web Store. In Firefox, go to the Firefox Add-ons page. In Safari, go to the App Store and search for extensions. Search for the name of the extension you want, click Add to Chrome (or Add to Firefox, or Install), and confirm. The extension will appear in your toolbar when ready.
Keep in mind that some websites detect ad blockers and ask you to turn them off before you can read the page. If you want to support a website you like, you can click the extension icon and toggle it off for just that site. The extension will remember your choice the next time you visit.
Why pop-ups keep appearing even with a blocker on
If you are still seeing pop-ups after checking your permissions and extensions, a few other things could be happening. First, make sure your browser is fully updated — older versions may have weaker blockers. In Chrome, click the three dots in the top right, go to Help, then About Google Chrome, and it will update automatically. In Firefox, click the three horizontal lines, go to Help, then About Firefox. In Safari, go to System Settings, then General, then Software Update.
Second, some pop-ups are not actually pop-ups — they are ads built into the webpage itself. Your blocker cannot stop these. Third, if you use an older computer or an older version of Windows or macOS, malware or adware may be installed on your system itself, not just in your browser. If pop-ups appear even when you are not using your browser, or if they show up on every website you visit, run a malware scan using Windows Defender (on Windows) or Malwarebytes (on any system).
Blocking pop-ups on mobile browsers
Mobile browsers have pop-up blockers too, but they work slightly differently. On iPhone and iPad, Safari blocks pop-ups by default and you cannot change this setting — it is always on. On Android, Chrome also blocks pop-ups by default. If you are still seeing pop-ups on mobile, the problem is usually an app you installed, not your browser.
To check your mobile browser's settings anyway, open Chrome on Android and tap the three dots in the bottom right, then Settings, then Site Settings, then Pop-ups. Make sure the toggle is off. If pop-ups continue, uninstall any recently installed apps, especially ones that promised to speed up your phone or clean your storage. These are common sources of mobile adware.
Frequently Asked Questions
Can I block pop-ups from one website but allow them on another?
Yes. Go to your browser's Site Settings for pop-ups, find the website in the "Block" list, and remove it. Or find the website in the "Allow" list and remove it from there. You can also click the lock icon next to the website's address in the browser bar and change the pop-up permission directly from there.
Will blocking pop-ups break websites or make them load slower?
No. Pop-up blockers do not affect how a website loads or functions. Websites may ask you to turn off your blocker before you can read them, but this is a choice the website made, not something the blocker caused. If a website does not work without allowing pop-ups, that website has a problem, not your blocker.
What is the difference between a pop-up and a pop-under?
A pop-up opens in front of the page you are reading. A pop-under opens behind it, so you do not see it until you close your browser window or tab. Most pop-up blockers stop both. If you notice a new tab or window opened when you close your browser, a pop-under got through.
Is it safe to install an ad-blocking extension?
Extensions from official stores like the Chrome Web Store and Firefox Add-ons are reviewed before they are published, so the major ones like uBlock Origin and Adblock Plus are safe. Always check the extension's permissions before you install it — if an ad blocker asks for permission to read your passwords or access your browsing history, do not install it.
Why do some websites ask me to disable my pop-up blocker?
Some websites use pop-ups for important features, like login windows or file downloads. Others ask you to disable your blocker so they can show you ads, which is how they make money. You can usually click "Block" when the website asks, and the website will still work — the request is just a suggestion, not a requirement.